private void processKeyPressedWhenSuggestionListIsVisible(KeyEvent e) {
int sel = suggestionList.getSelectedIndex();
int max = suggestionList.getItemCount() - 1;
int next;
switch (e.getKeyCode()) {
case KeyEvent.VK_UP:
case KeyEvent.VK_NUMPAD8:
next = sel - 1;
break;
case KeyEvent.VK_DOWN:
case KeyEvent.VK_NUMPAD2:
next = sel + 1;
break;
case KeyEvent.VK_PAGE_UP:
next = sel - comboBox.getMaximumRowCount();
break;
case KeyEvent.VK_PAGE_DOWN:
next = sel + comboBox.getMaximumRowCount();
break;
case KeyEvent.VK_HOME:
next = 0;
break;
case KeyEvent.VK_END:
next = max;
break;
case KeyEvent.VK_ENTER:
processEnterPressed();
return;
case KeyEvent.VK_ESCAPE:
suggestionList.hide();
return;
default:
// invoke in end of AWT thread so that information in textEditor would update
SwingUtilities.invokeLater(this);
return;
}
e.consume();
handleNavigationKeys(true, next, sel, max);
}
/**
* Constructor.
*
* @param combo combobox reference
*/
ComboPopup(final JComboBox combo) {
super(combo);
final int h = combo.getMaximumRowCount();
setPreferredSize(new Dimension(getPreferredSize().width, getPopupHeightForRowCount(h) + 2));
}
/*
* I can't find any property on the scrollBar to determine if it will be
* displayed or not so use brute force to determine this.
*/
protected int getScrollBarWidth(BasicComboPopup popup, JScrollPane scrollPane) {
int scrollBarWidth = 0;
JComboBox comboBox = (JComboBox) popup.getInvoker();
if (comboBox.getItemCount() > comboBox.getMaximumRowCount()) {
JScrollBar vertical = scrollPane.getVerticalScrollBar();
scrollBarWidth = vertical.getPreferredSize().width;
}
return scrollBarWidth;
}
